从本地计算机上的ubuntu(AWS EC2)中读取文件?

问题描述

我有一个在AWS(Ubuntu的EC2实例)上运行的python脚本.该python脚本每天将JSON文件输出到/home/ubuntu中的目录:

I have a python script which I'm running on AWS (EC2 instance with Ubuntu). This python script outputs a JSON file daily, to a directory in /home/ubuntu:

with open("/home/ubuntu/bandsintown/sf_events.json", "w") as writeJSON:
file_str = json.dumps(allEvents, sort_keys=True)
file_str = "var sf_events = " + file_str

所有操作均符合此处的预期.我的问题是我不确定如何将此JSON(存在于ubuntu上)读入我在本地计算机上运行的javascript文件中.

All works as expected here. My issue is that I'm unsure of how to read this JSON (existing on ubuntu) into a javascript file that I'm running on my local machine.

如果我从ubuntu调用文件，则Javascript无法找到该文件:

Javascript can't find the file if I call the file from ubuntu:

<script src="/home/ubuntu/bandsintown/sf_events.json"></script>

换句话说，我想将我在云中创建的JSON读取到本地计算机上存在的文件中.我应该在home/ubuntu之外的其他地方输出JSON吗?或者，我的本地文件可以以某种方式将/home/ubuntu识别为文件位置吗?

In other words, I'd like to read in the JSON that I've created in the cloud, to a file that exists on my local machine. Should I output the JSON somewhere other than home/ubuntu? Or, can my local file somehow recognize /home/ubuntu as a file location?

先谢谢了.

推荐答案

之所以会出现此问题，是因为文件不存在在您的本地计算机上(仅在正在运行的EC2实例上).一种可能的解决方案是将JSON文件从EC2实例上传到S3，然后将JSON文件下载到本地计算机/home/ubuntu/bandsintown/sf_events.json.

The problem occurs because the file does not exist on your local machine, only on the running EC2 instance.A possible solution is to upload the JSON file from EC2 instance to S3 and afterward download the JSON file to your local machine /home/ubuntu/bandsintown/sf_events.json.

首先，在正在运行的EC2实例上安装AWS CLI工具包 AWS CLI ，并在终端上运行以下命令

First, install the AWS CLI toolkit on running EC2 instance AWS CLI and run the following commands in the terminal

aws configure
aws s3 cp /home/ubuntu/bandsintown/sf_events.json s3://mybucket/sf_events.json

或安装Python AWS开发工具包 boto3 并通过python上传

Or install Python AWS SDK boto3 and upload it via python

s3 = boto3.resource('s3')

def upload_file_to_s3(s3_path, local_path):
    bucket = s3_path.split('/')[2] #bucket is always second as paths are S3://bucket/.././
    file_path = '/'.join(s3_path.split('/')[3:])
    response = s3.Object(bucket, file_path).upload_file(local_path)
    return response

s3_path = "s3://mybucket/sf_events.json"
local_path = "/home/ubuntu/bandsintown/sf_events.json"
upload_file_to_s3(s3_path, local_path)

然后在本地计算机上通过AWS CLI从s3下载文件

Then on your local machine download file from s3 via AWS CLI

aws configure
aws s3 cp s3://mybucket/sf_events.json /home/ubuntu/bandsintown/sf_events.json

或者，如果您更喜欢python SDK:

Or if you prefer python SDK:

s3 = boto3.resource('s3')

def download_file_from_s3(s3_path, local_path):
    bucket = s3_path.split('/')[2] #bucket is always second as paths are S3://bucket/.././
    file_path = '/'.join(s3_path.split('/')[3:])
    filename = os.path.basename(s3_path)
    s3.Object(bucket, file_path).download_file(local_file_path)

s3_path = "s3://mybucket/sf_events.json"
local_path = "/home/ubuntu/bandsintown/sf_events.json"
download_file_from_s3(s3_path, local_path)

或使用在浏览器中运行的Javascript SDK，但我不建议您这样做，因为您必须公开存储桶并同时注意浏览器的兼容性问题

Or using Javascript SDK running inside of browser, but I would not recommend this because you must make your bucket public and also take care of browser compatibility issue

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